create_node · Agent-hive MCP: Risk & Policy

WHAT IT DOES

What create_node does on Agent-hive

AI agents use create_node to create or update resources in Agent-hive — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Agent-hive environment.

WHY IT NEEDS A POLICY

Why create_node needs a policy

This tool creates new entries in a shared knowledge graph but does not delete, execute arbitrary code, move funds, or trigger external side effects. Creation is reversible (nodes can be edited or deleted via sibling tools like delete_node or edit_node).

From the tool's definition Tool description states 'Create a new knowledge node' — explicitly a creation action that modifies the graph by adding reversible data structures (question, answer, doc, snippet, or gotcha).

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_node Rate-limited

create_node stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_node": {
      "limits": [
        {
          "counter": "create_node_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Agent-hive, so you can run agents against it safely.

FAQ

Questions about create_node

What does the create_node tool do? +

Create a new knowledge node in the graph (question, answer, doc, snippet, or gotcha). It is categorised as a Write tool in the Agent-hive MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_node? +

Register the Agent-hive MCP server in PolicyLayer and add a rule for create_node: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Agent-hive. Nothing to install.

What risk level is create_node? +

create_node is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_node? +

Yes. Add a rate_limit block to the create_node rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block create_node completely? +

Set action: deny in the PolicyLayer policy for create_node. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides create_node? +

create_node is provided by the Agent-hive MCP server (kelvinyuefanli/agent-hive). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.